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U.S. Department of Health and Human Services

Food

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Perchlorate

Perchlorate is a naturally occurring and manmade chemical that can affect the functioning of the thyroid gland at sufficiently high doses. Perchlorate is present in some public drinking water systems and in some foods. FDA has monitored perchlorate levels in a variety of foods and conducted an exposure assessment to determine the exposure of U.S. consumers to perchlorate from the diet.